Where to find 5vdc on phantom 1.1.1

I have phantom1.1.1 and sony hdr-as15. Sony action cam only have hdmi output. I found board that,i belive, plugs into sony nex camera and change hdmi to composite signal . http://www.banggood.com/Aerial-FPV-HDMI ... 09951.html
My question is where could i tap into 5vdc on phantom without possibly voiding warranty.
Is there 5vdc or do i have to take battery voltage and drop it down to 5vdc?
Other option that i think about is hacking into new sony attachment http://store.sony.com/action-cam-camcor ... D27-AKALU1
Sony action cam have expantion port on the battom and im sure there is way to tap into video there, just dont know how.

I have phantom1.1.1 and sony hdr-as15. Sony action cam only have hdmi output. I found board that,i belive, plugs into sony nex camera and change hdmi to composite signal . http://www.banggood.com/Aerial-FPV-HDMI ... 09951.html
My question is where could i tap into 5vdc on phantom without possibly voiding warranty.
Is there 5vdc or do i have to take battery voltage and drop it down to 5vdc?
Other option that i think about is hacking into new sony attachment http://store.sony.com/action-cam-camcor ... D27-AKALU1
Sony action cam have expantion port on the battom and im sure there is way to tap into video there, just dont know how.

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Easiest way is to tap unregulated voltage from the battery and go through a UBEC to step down to 5v. The Phantom does have 5vdc regulated voltage. The NAZA can supply it in small amounts, but I wouldn't try to power anything off of that. You COULD draw 5v directly from the positive lead from the mainboard-to-X3 wire, but what that means as to warranty...